Respuesta :

Answer:

f=3

Step-by-step explanation:

f(x) =2x-1 x = 1/2
f(x) =1/2x + 7/2 = -7
f(x) =1/2x + 3/2 = -3
f(x) =2x^2 - 3x + 1 = 2(x- 3/4)^2 - 1/8